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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Jun. 30, 2019
Sep. 30, 2018
Current assets:    
Cash and cash equivalents $ 79,909 $ 103,311
Marketable securities   19,921
Restricted cash 3,647 3,823
Receivables, net 7,902 14,290
Expendable parts and supplies, net 20,268 15,658
Prepaid expenses and other current assets 46,425 40,914
Total current assets 158,151 197,917
Property and equipment, net 1,286,022 1,250,829
Intangibles, net 9,984 11,341
Lease and equipment deposits 1,977 2,598
Other assets 9,849 9,703
Total assets 1,465,983 1,472,388
Current liabilities:    
Current portion of long-term debt and capital leases 163,623 155,170
Accounts payable ($4,859 and $1,330 to related party) 33,585 54,307
Accrued compensation 14,492 12,208
Other accrued expenses 34,152 29,696
Total current liabilities 245,852 251,381
Noncurrent liabilities:    
Long-term debt and capital leases, excluding current portion 717,546 760,177
Deferred credits ($6,288 and $7,702 to related party) 13,401 15,393
Deferred income taxes 50,695 39,797
Other noncurrent liabilities 25,755 31,173
Total noncurrent liabilities 807,397 846,540
Total liabilities 1,053,249 1,097,921
Commitments and contingencies (Note 13 and Note 14)
Stockholders' equity:    
Preferred stock of no par value, 5,000,000 shares authorized; no shares issued and outstanding
Common stock of no par value and additional paid-in capital, 125,000,000 shares authorized; 30,361,168 (2019) and 23,902,903 (2018) shares issued and outstanding, 4,603,333 (2019) and 10,614,990 (2018) warrants issued and outstanding 237,613 234,683
Retained earnings 175,121 139,784
Total stockholders' equity 412,734 374,467
Total liabilities and stockholders' equity $ 1,465,983 $ 1,472,388